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- FOCUSRITE ISA 828 MkII
Description
Sharing the simple mic preamp design of the original Focusrite ISA 110 module from the Focusrite Studio Console, ISA 828 MK2 incorporates eight of Focusrite's classic mic preamps, with Lundahl LL1538 transformers on every input. Each channel has the option of mic or line inputs, while inputs 1-4 also feature instrument inputs on the front panel. Each mic pre has variable input impedance, to provide a range of subtly different sonic options when using microphones, including an 'ISA 110' setting, which replicates the impedance of the original Focusrite mic pre
Up to 60dB of gain is available, with a further +20dB of continuously variable trim, providing a huge 80dB gain range. The high-pass filter with fixed 75Hz frequency and 18dB/octave roll-off. ISA 828 MK2 features high-pass filters, calibratable per-channel, six-segment LED meters, and switchable rear-panel insert points, which allow the use of inline processors such as compressors or EQs.
Dedicated connectors for mic and line-level inputs allow all sources to be connected simultaneously, making ISA 828 MK2 perfect for permanent installation in a rack. New to the ISA 828 MK2 is an updated power supply that allows for more efficient power consumption, a reduction in heat generation, and extremely reliable operation. The optional ISA ADN8 analogue-to-digital expansion card provides eight Dante, ADAT and AES3 outputs at rates of up to 24-bit/192kHz.
EIGHT-CHANNEL MIC PRE AND OPTIONAL A-D CARD WITH DANTE
THE FOCUSRITE STUDIO CONSOLE REBORN IN YOUR DAW
- Classic ISA mic preamp design featuring Lundahl LL1538 input transformer
- Switching power supply design allows for efficient and cool operation
- Front-panel instrument inputs to the first four channels offer two impedance options: High (2.4 MΩ) and Low (470 kΩ)
- Line inputs with dedicated input connectors and front-panel switch
- Switchable input impedance including classic ISA 110 setting
- High-pass filters
- Switchable insert points when used with A-D card
- Calibratable, per-channel six-segment LED peak-level meters
- Optional A-D card with up to 192kHz, 24-bit sampling offers high-quality, precision digital audio conversion to Dante, ADAT and AES3 (sold separately)
Specifications
Mic Inputs
- Gain Range: 0 dB to +30 dB (30-60 switch disabled) and +30 dB to +60 dB (30-60 switch enabled) in 10 dB steps, with an additional +20 dB of continuous trim
- Input Impedance: Low = 600 Ω, ISA 110 = 1400 Ω, Medium = 2400 Ω, High = 6800 Ω
- Maximum Input Level: +7 dBu, minimum gain, Medium Z
- Frequency Response (20 Hz - 20 kHz): 20 Hz - 20 kHz ±0.2 dB, minimum gain, Medium Z
- THD + N: -91 dB (0.0028%) @ -1 dBr, minimum gain, Medium Z
- EIN: -123 dBu, A-weighted (typical)
- Signal-to-Noise Ratio: 122 dB, A-weighted (typical), Medium Z
- Common-Mode Rejection Ratio: 997 Hz CMRR: -93 dB, minimum gain, Medium Z
- Phantom Power: +48 V, independently switchable per channel
- High-Pass Filter: 75 Hz knee frequency, 18 dB/octave, independently switchable per channel
- Phase: Inverts the phase of the selected input
- Frequency Response (10 Hz - 110 kHz): 10 Hz - 110 kHz ±1.5 dB, minimum gain, Medium Z
Line Inputs
- Gain Range: -20 dB to +10 dB in 10 dB steps, with an additional +20 dB of continuous trim
- Input Impedance: Low = 600 Ω, ISA 110 = 1400 Ω, Medium = 2400 Ω, High = 6800 Ω
- Maximum Input Level: +25 dBu, minimum gain, Low Z
- Frequency Response (20 Hz - 20 kHz): 20 Hz - 20 kHz ±0.1 dB, minimum gain, Low Z
- THD + N: -91 dB (0.0028%) @ -1 dBr, minimum gain, Low Z
- Signal-to-Noise Ratio: 122 dB, A-weighted (typical), minimum gain, Low Z
- Frequency Response (10 Hz - 122 kHz): 10 Hz - 122 kHz ±3 dB, minimum gain, Low Z
Instrument Inputs
- Gain Range: +10 dB to +40 dB with continuous gain using trim pot
Front Panel Connectivity
- Channel Count: 2 channels in
- Instrument Inputs: 4 × 1/4" jack inputs
Rear Panel Connectivity
- Mic Inputs: 8 × Female XLR inputs
Line Level
- Channel Count: 8 in / 8 out
- Inputs: 8 × 1/4" jack inputs
- Outputs: 1 × DB-25 connector (AES59)
Inserts
- Channel Count: 8 in
- Inputs: 1 × DB-25 connector (AES59)
Digital Card Slot
- Compatible Card: ISA ADN8
Front Panel Indicators & Controls
- Control Functions: 16 × pots (Gain and Trim)
- Switches / Controls: On/Off, 30-60 Gain, +48 V, Phase, HPF, Insert, Z In, Input, Meters Pre A-D, Clock Select and External Word Clock
Rear Panel Controls
- Control Functions: 1 × pot (Meter Trim)
In the Box
- ISA 828 MkII Eight-Channel Mic Preamp Unit
- AC Power Cable
- Safety Information Cut Sheet
- Important Information Guide